Filtering apparatus.



M. DBACONRE vv. GORE.

FILTBRING APPARATUS.

APPLIGATION FILED 1350.3. 1912.

Patented Mar. 2, 1915.

3 SHEETS-SHEET 2.

WMM/96.956. l f/ f M. BEACON '& W. GORE.

PILTERING APPARATUS..

APPLICATION FILED DEC, 3` 1912.

Patented Mar. 2, 1915.

3 SHEETS-'SHEET 3.

y /lVVE/VTORS EILTLJEING APPARATUS.

ueciieation of Letters Patent.

Application le December 3, 1912. Serial No. 334334.

To ali 'whom t may concern s and VILLIAM Goins, subjects of the ling of England, residing at London, in England, have invented certain new and useful Iniprovenients in Filtering Apparatus, of which the following is a specification. r

rlhis invention relates to liltering apparatus and has particular reference to an improved construction of filter of the kind in which the sand or other liltering medium is automatically transferred during'the operation of the' "ilter from one part of the filtering mass to another. In Alilters of this type the transference of the finely divided material conveniently takes place from the bottom to the top andnit has' been found that when this is the case there lis formed within the containing vessel a cone of sand of considerable height 'which is practically stationary, thevinoving sand traveling by various paths through they annular space between the wall of the container and the boundary of the cone of vstationary sand. Thus in addition to the filtering lilms which are formed on the top of the mass and lthroughout its depth a film will also be produced on the outside of the above mentioned cone, of comparatively stationary sand. t follows that the available area for ltering is larvely increased and that the liquid to be liltered can with advantage be admitted not merely from the top of the apparatusbut `from other points in order to ltake full advantage of the film area.

The prima-ry object oi the present invention is the construction of a filter which shall utilize eliiciently the Varea of the iltering films above mentioned. l

The improved filter comprises a containing vessel having within it the mass of sand or other finely divided lilteringmaterial and preferably furnished with a hopperlike lower portion from which the sand is removed little by little, say by some form of ejector operated by the liquid undertreat'- ment. But `instead ofthe liquid beingadmitted to the ltering mass only at the 'top as in the previous construction it is allowed to flow in JfromV the sides. plished by providing the cylindrical container with a liner or internal cylinder or cylinders perforated or otherwise t'orined'or disposed so to allow the liquid to flow through 1t. This liner is of smaller dia-nieter the containing vessel and is sup This is ,acconc-V an annular space hetween them down which the liquid to he filtered can pass.

Fatented ll/lar. 31915./

ln the accompanying drawings Figure vf1, f

is a verticalentral section showing a con.-l

struction-oi filter according to this invention adapted for use below the ground level. F ig. 2 shows'the lower portion of Fig. l drawn to a larger scale. Fig. 3 is a view similar to Fig. 1 showing another form of filter also according to this invention adapted for use above the ground level. "Fig 4 is a plan of the construction shown in Fig. 3 with parts removed. Fig. 5 is a Vertical section drawn to an enlarged scale showing a portion of the inner chamber or liner .of theilters shown in F igs. 1 and'3. Fig; 6 is a vertical central section drawn to a larger scale and showing.:Y the lower part .of another forni of filter also according to this'inven tions and Fig. 7 is a transverse section on theline 7-7 of Fig. 6.

Like letters indicate like out the drawings. .l

With reference' lirst to Figs. 1 and Zthis form of filter is adapted for use below the 'ground level and the outer wall of the container is inl the form of a circular pit Arof concrete or other suitable material. Within this pit is a. liner formed of a series of short 'cylinders or rings B held by nuts and 'bolts B (Fig. i5) to bars or framesl C which are themselves supported in any convenient way within the circular pit A.. The rings B departs throughcrease in diameter as they 4approach the Sie top so that the whole liner is of slightly uid to be treated can pass from the annular space into the nely divided sand or other filtering mdium within the liner. v y.

The lower portion of the pit A is made of conicalshape and is furnished with a hop'- perlike liner E closed by a top portion Ef.

lim

which forms, partially, the bottomothe filter proper, that is to say, it prevents the main body of the sand from falling down within the liner. The' hopper E is supported from a central tuoe F hungfroin cross-girders (l and perforated to allow the menace im Fig. shows ineection the bottom por# the perforar-ted pipe, und means whereby the tion oi e modified construction of filter also filtering medium may be transferred from. 30

l5 trol pipe passes out in e '15 tures S in the casting out through sire to secure by Letters Patent 1s ing medium is transferred from the bottom according to this invention in which the iilthe bottom of the'outer vessel through said tered liquid instead of rising through e censecond pipe end returned tothe top of the tion indicated ilteringl mess. by theerrows a. In thisconstruction which 2. In a lter the combination of an outer me be'otherwise similar to the forms shown vessel or casing, en inner chamber or liner 35 in fig'eol and. 3 e casting S is provided beadapted to contain the ltering medium e'nd ueeth the conical bottom of =the vessel A and having apertures or spaces in its periphery l0 the filtered `liquid passing down the central thi-ou h which the liquid to be filtered can passage proceeds out through openings S pese rom the specs between the outer vessel and en annuler this construction the send coming down tering materiel, e central perforated tube the peeeges K Kwould pese throng eperinto which the ltered liquid can pass from #to the the ltering medium, another pipe within. n ejector endthen be carried to the washer. vhthe perforated pipe forming e conduit for t we cleurn es our inventionl and detwo pipes J Jby ineens of which the ilter- 4 1. In e filter, the combination of en outer of the outer vessel end returned to the top 20 vowel or casing, sin inner chamber or liner of the iiltering me adopted to contein the ltering medium and In testimony whereof we have si ving apertures or spaces yin its vriphery names to this specification in the Pr Y thro h which the liquid to be tered een 'two subscribing witnesses pees om the space between the outer vessel MARTIN DEAGN. '25 and the inner chamber into the 'mass of {i1- WILLIAM GORE.` termg material, e central perforated tube lllitnessesz into which the filtered liquid cen pass from' O. J. Worm,

the filtering medium, e. second pipe within C. P. Limon.

space S? to the mein M2. end the inner chamber into the mess of il- -40 l ed our nce of 50 

